| 摘要 |
The device (1) comprises a air channel (2) having a movable flap (3) to adjust air passage opening (4) based on pressure difference between inlet and outlet openings (5,6). The flap around horizontal suspension point (7), is moved with increase in pressure difference under the influence of elastic resistance force. The flap in the longitudinal direction of suspension point is twisted and elastic resistance force from rotational output angle portion (8) to maximum rotational angle portion by contact (9) is generated between portion of air channel and flap. |
